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| Vulnerability ID | VCID-rrva-95s5-kbcf |
| Aliases |
CVE-2026-33309
GHSA-g2j9-7rj2-gm6c PYSEC-2026-79 |
| Summary | Langflow is a tool for building and deploying AI-powered agents and workflows. Versions 1.2.0 through 1.8.1 have a bypass of the patch for CVE-2025-68478 (External Control of File Name), leading to the root architectural issue within `LocalStorageService` remaining unresolved. Because the underlying storage layer lacks boundary containment checks, the system relies entirely on the HTTP-layer `ValidatedFileName` dependency. This defense-in-depth failure leaves the `POST /api/v2/files/` endpoint vulnerable to Arbitrary File Write. The multipart upload filename bypasses the path-parameter guard, allowing authenticated attackers to write files anywhere on the host system, leading to Remote Code Execution (RCE). Version 1.9.0 contains an updated fix. |
| Status | Published |
| Exploitability | None |
| Weighted Severity | None |
| Risk | None |
| Affected and Fixed Packages | Package Details |
| There are no known CWE. |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 9.9 | https://github.com/langflow-ai/langflow/security/advisories/GHSA-g2j9-7rj2-gm6c |
| Reference id | Reference type | URL |
|---|---|---|
| https://github.com/langflow-ai/langflow/security/advisories/GHSA-g2j9-7rj2-gm6c |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
No EPSS data available for this vulnerability.
| Date | Actor | Action | Source | VulnerableCode Version |
|---|---|---|---|---|
| 2026-06-02T04:24:22.014868+00:00 | Pypa Importer | Import | https://github.com/pypa/advisory-database/blob/main/vulns/langflow/PYSEC-2026-79.yaml | 38.6.0 |